Application of Ion Sensitive Probe to High Density Plasmas in Magnum-PSI

Yuki HAYASHI; Noriyasu OHNO; Hennie van der MEIDEN; John SCHOLTEN; Shin KAJITA; Jonathan van den BERG; Renato PERILLO; Jordy VERNIMMEN; Thomas MORGAN

doi:10.1585/pfr.14.1202135

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Application of Ion Sensitive Probe to High Density Plasmas in Magnum-PSI

Yuki HAYASHI, Noriyasu OHNO, Hennie van der MEIDEN, John SCHOLTEN, Shin KAJITA, Jonathan van den BERG, Renato PERILLO, Jordy VERNIMMEN, Thomas MORGAN

Author information

Yuki HAYASHI
National Institute for Fusion Science, National Institutes of National Sciences
Noriyasu OHNO
Graduate School of Engineering, Nagoya University
Hennie van der MEIDEN
DIFFER–Dutch Institute for Fundamental Energy Research
John SCHOLTEN
DIFFER–Dutch Institute for Fundamental Energy Research
Shin KAJITA
Institute of Materials and Systems for Sustainability, Nagoya University
Jonathan van den BERG
DIFFER–Dutch Institute for Fundamental Energy Research
Renato PERILLO
DIFFER–Dutch Institute for Fundamental Energy Research
Jordy VERNIMMEN
DIFFER–Dutch Institute for Fundamental Energy Research
Thomas MORGAN
DIFFER–Dutch Institute for Fundamental Energy Research

Keywords: ion sensitive probe, ion temperature, I-V characteristic, Magnum-PSI

JOURNAL FREE ACCESS

2019 Volume 14 Pages 1202135

DOI https://doi.org/10.1585/pfr.14.1202135

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Abstract

Feasibility of an ion sensitive probe was evaluated in high electron density (> 5 × 10¹⁹m⁻³) helium plasmas produced in the Magnum-PSI device. The ion sensitive probe showed that the ion temperature was ∼ 1 eV and almost equal to the electron temperature. Increasing the neutral pressure to efficiently lead to the electron-ion recombination processes, the electron currents were collected at the ion collector. A secondary electron emission in the guard electrode might have an effect on the ion current.

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